Duplicator



Aug. 21, 1923.

G. R, SCULTHORP DUPLICATOR Filed Sept. l2 1921 Patented Aug. 2l 1923.

encuen Beernem soprrrronr,'or.enncn, ENGnANn.

Application fuertemente 12, ,1921- ,Serial Np. 500,291(

.Z 'Q all fw from t may concern. i

Be itknown tliatGno'igor RnGiNALD Scun- 'r.uon r, subject of thelingyofGi-eai', Britain and Ireland, readings@ alhalrf Landen,

England, has invented new oi' improved .of livlib" .the following is .e

number'. Mypresent `imprloyenien ts aim atsmplfyngthe constructie@ Q f:the 'auparatus, che'aPenieg-ts l1@widuetf?.11, and @making it perhapseasier to manipulate. fltlis cer-- tamly no less .etcient vthan`irrenons apparatus or the kind and .Some-@Smets maybe eren more SO- ltis, unitair.er.,v Yelyompact and handy requiring only a small space lfor.storage `or :transport Y VThe accompanyingdrarving Villustrates ltheinvention, Eig. 2 1 being aperjspective .View and Fig. 2 a`.centralyertcllse'ctionv- Referring to .the saidgdrayying A grepre- `sentsashallow rectangular tray, madeof zinc or alloy Vor other suitablematerial,

felt, or insteadofrfelt, A alargeflat p ad made more or less after thefashion of an ink pad could be vprovided such asl'is commonly used forrubber stamp pads. This absorbent pad B covers practically the Wholebottom of the tra A.

llpon this absorbent pad B a foraminous metalplate C is superposed,which for convenience may be made of the same material as the tray, andthe perforations p are closely distributed through its' thickness,leaving a plain margin around its outer edges. AV

sheet of linen D or equivalent porous fabric or material is applied uponthe perforatedV plate C being fastened thereto in some suitable fashion,For example, four (or any other convenient number of) studs H are fixedin upright position close to the top end of the plate C and the poroussheet'D will then be provided With holes-or eyelets 7L for passing oversuch studs H and thereby7 pre ventingdisplacement of such sheet D.

Before using the apparatus, the pad B must be Well inked with an inkybrush or other Yc eption or expression of `thev ink or v,edge forpassing over the studs H., ysomewhat larger-than lthe size Voftliefgstenr cil to `be used, land'in this is 'laidfa sheet orpadof'ab'sorbelltimaterial B, such as thielr means Aby which the inlryfluid (or paint,- vis Wellspread over tlxe'pad (o .of -it asis'rcqui'red rforthe particular stencilled area), untilthe pad is'thoroughly f soaked with from front tobaclr, constituting a kind of'ink'Y reservoir.' may have cells or Aperforatiolils in it, fo'rthe'purpose of, assisting in 4the distributiomre- Huid: The perforated plateCy and'v absorbent Asheet Dhavingthen been' laid onfthefp afdBv .y

thus prepared, pressure is applied. byan ordinaryhand roller orotherwise, which causes thefluid to be forced upthrougliftheperforations p in the yplate C and to'soalk into 4the sheetindependently beforehand orY the absorbent sheetD" It is advisabletofink at leastto moisten it, so astorender itY moresusceptible tocomplete saturation `by the ink. lfv this is done effectuallypit may i,not always'be necessary toapplyfprelimi nary vpressure tothe said`sheet `and' "plate before applying the waxed stencil E, ,(pre- -paredbya typewriter or stylolin the kusual `manner) inasmuchas pressure isVcase ,traiisrnittedjV1 yj the operation ofy printing i frenitheapparatus vas followsg Tliefstencil l E Vcontains arrow of holes sV,near the top The Vpaper to ,beprinted upon islaid face i lt; c anfbeVdoiiej by'r themand V in some rases. A roller, however, is preferable'.The" i`m pression is produced on the paper owingY to the printing fluidbeing forced through the stencil E from theporous absorbent sheet D,'andthe latter is continually replen ished by the pad B from which the fluidis squeezed V'and can only escape vthrough the holes p in the plate Cinto the said absorbent sheet D.

When' itis desired'to fasten .the bottom downwardson thelpreparedstencilE and Arollen? passed over the back ofthe .paper ,Whilst inthisposition7 oranyotlier'sortof Y pressure L:distribaed ferenlymay beiar'iildend of the'sheet D also, this may be done by forming a pocket inthis end of the sheet by doubling the bott-0in of `the sheet, asiat'`v(Z, and closing the two ends lof such pocket" by stitching. e In fixingthesheet D in 'posi-. tion, thepocket Z `(which will then be onj theunder sideV of the sheet) is first pulled on i to the bottoniVV end ofthe plate C, and the length of the sheet D is such that it liasft'o bestretched Vtightly in orderY for its holes' 7iat the opposite end to bepassed over theY tom edge to accommodate the closed ends of i the pocketl as will easily be understood.

A small linger knob I*` is conveniently proi vided upon the top face ofthe perforated plate C close against one edge so that the Vplate may beeasily lifted. rlhe body of the stencil'E will adhere'to the sheet D byreason of the viscosity of the ink or such like substance and it isneither necessary nor advisable to fasten'the stencil by its bottom endalso. It is held at its top end by the same studs II which hold theporous sheet D as already stated. The free end'of the stencil sheet EallowsV of unavoidable slight extension when rolled, this freedompreventing itfrom ruclring up. An' adjustable slide A injury to may beprovided upon the sides of the tray A for indicating the proper positionof the paper to be printed upon.

A suitable position indicator is shown in the drawing in the formy of aYthin metal strip J extending from side to side of the tray A. `T he endsrof this strip d each bear a spring clamp or saddle K adapted to gripupon the upstanding edges ofthe tray A; lat any distance .from the ends.The bar J throughout the greater portion of its length and for abouthalf of its Width is preferably bent up at a right angle, forming a stopJ1 for the top of the paper, Whilst the remainder of the bar forms aflat plate J2.' The object of the flat portion J2 is, first, to pre- Ysent a small non-sticky surface of metal for 'the corner of the paper'to rest upon, thus greatly' facilitating the lifting off of the paperYsheet with the finger and avoiding the stencil Which is unavoidablewhen repeatedly picking 0E sheets ofv paper by their corners when theylie direct on the stencil. A further object of the fiat portion J2 is tocontain a naine number trade mark or advertisement of the apparatus orits manufacturers. Y

The apparatus can be packed neatly and compactly in a case or box, in.which may also be housed the ink, brush, and any other appurtenances.

Having thus described my said invention,

2. In combination in a duplicator, a tray, Y

a reservoir pad therein, aperforated plate on said'pad, an absorbent padon said perforated plate, and Van indicator carried bysaid tray andcooperating Withfsaid, absorbent 'pad and `comprising an adjustablestrip having one portiony turned to forma guide for the top of the paperand the other left the stencil. v f

3. In combination in a duplicator, a tray, a compressible reservoir padtherein adapted flat to facilitate lifting of the `Vpaper from to becharged with a suitable printing fluid,

a perforated plate on saidpad and freely movable within said tray tocompress said pad between said plate and said trayand thereby forceprinting fluidithrough said plate, andan absorbent pad onA the side of"VY rsaid plate opposite said reservoir pad and adapted to receiveprinting fluid from said reservoir pad through said plate.

GEORGE REGINALD SCULTHORP.`

